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Merge branch 'for-3.14' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
Pull cgroup updates from Tejun Heo:
"The bulk of changes are cleanups and preparations for the upcoming
kernfs conversion.
- cgroup_event mechanism which is and will be used only by memcg is
moved to memcg.
- pidlist handling is updated so that it can be served by seq_file.
Also, the list is not sorted if sane_behavior. cgroup
documentation explicitly states that the file is not sorted but it
has been for quite some time.
- All cgroup file handling now happens on top of seq_file. This is
to prepare for kernfs conversion. In addition, all operations are
restructured so that they map 1-1 to kernfs operations.
- Other cleanups and low-pri fixes"
* 'for-3.14' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup: (40 commits)
cgroup: trivial style updates
cgroup: remove stray references to css_id
doc: cgroups: Fix typo in doc/cgroups
cgroup: fix fail path in cgroup_load_subsys()
cgroup: fix missing unlock on error in cgroup_load_subsys()
cgroup: remove for_each_root_subsys()
cgroup: implement for_each_css()
cgroup: factor out cgroup_subsys_state creation into create_css()
cgroup: combine css handling loops in cgroup_create()
cgroup: reorder operations in cgroup_create()
cgroup: make for_each_subsys() useable under cgroup_root_mutex
cgroup: css iterations and css_from_dir() are safe under cgroup_mutex
cgroup: unify pidlist and other file handling
cgroup: replace cftype->read_seq_string() with cftype->seq_show()
cgroup: attach cgroup_open_file to all cgroup files
cgroup: generalize cgroup_pidlist_open_file
cgroup: unify read path so that seq_file is always used
cgroup: unify cgroup_write_X64() and cgroup_write_string()
cgroup: remove cftype->read(), ->read_map() and ->write()
hugetlb_cgroup: convert away from cftype->read()
...
This commit is contained in:
Linus Torvalds
commit
f075e0f699
@ -24,7 +24,6 @@ CONTENTS:
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2.1 Basic Usage
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2.2 Attaching processes
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2.3 Mounting hierarchies by name
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2.4 Notification API
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3. Kernel API
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3.1 Overview
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3.2 Synchronization
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@ -472,25 +471,6 @@ you give a subsystem a name.
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The name of the subsystem appears as part of the hierarchy description
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in /proc/mounts and /proc/<pid>/cgroups.
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2.4 Notification API
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--------------------
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There is mechanism which allows to get notifications about changing
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status of a cgroup.
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To register a new notification handler you need to:
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- create a file descriptor for event notification using eventfd(2);
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- open a control file to be monitored (e.g. memory.usage_in_bytes);
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- write "<event_fd> <control_fd> <args>" to cgroup.event_control.
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Interpretation of args is defined by control file implementation;
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eventfd will be woken up by control file implementation or when the
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cgroup is removed.
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To unregister a notification handler just close eventfd.
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NOTE: Support of notifications should be implemented for the control
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file. See documentation for the subsystem.
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3. Kernel API
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=============
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@ -577,7 +577,7 @@ Each memcg's numa_stat file includes "total", "file", "anon" and "unevictable"
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per-node page counts including "hierarchical_<counter>" which sums up all
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hierarchical children's values in addition to the memcg's own value.
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The ouput format of memory.numa_stat is:
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The output format of memory.numa_stat is:
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total=<total pages> N0=<node 0 pages> N1=<node 1 pages> ...
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file=<total file pages> N0=<node 0 pages> N1=<node 1 pages> ...
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@ -670,7 +670,7 @@ page tables.
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8.1 Interface
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This feature is disabled by default. It can be enabledi (and disabled again) by
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This feature is disabled by default. It can be enabled (and disabled again) by
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writing to memory.move_charge_at_immigrate of the destination cgroup.
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If you want to enable it:
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@ -97,8 +97,8 @@ to work with it.
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(struct res_counter *rc, struct res_counter *top,
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unsinged long val)
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Almost same as res_cunter_uncharge() but propagation of uncharge
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stops when rc == top. This is useful when kill a res_coutner in
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Almost same as res_counter_uncharge() but propagation of uncharge
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stops when rc == top. This is useful when kill a res_counter in
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child cgroup.
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2.1 Other accounting routines
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@ -1303,13 +1303,10 @@ static u64 tg_prfill_cpu_rwstat(struct seq_file *sf,
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return __blkg_prfill_rwstat(sf, pd, &rwstat);
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}
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static int tg_print_cpu_rwstat(struct cgroup_subsys_state *css,
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struct cftype *cft, struct seq_file *sf)
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static int tg_print_cpu_rwstat(struct seq_file *sf, void *v)
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{
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struct blkcg *blkcg = css_to_blkcg(css);
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blkcg_print_blkgs(sf, blkcg, tg_prfill_cpu_rwstat, &blkcg_policy_throtl,
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cft->private, true);
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blkcg_print_blkgs(sf, css_to_blkcg(seq_css(sf)), tg_prfill_cpu_rwstat,
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&blkcg_policy_throtl, seq_cft(sf)->private, true);
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return 0;
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}
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@ -1335,19 +1332,17 @@ static u64 tg_prfill_conf_uint(struct seq_file *sf, struct blkg_policy_data *pd,
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return __blkg_prfill_u64(sf, pd, v);
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}
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static int tg_print_conf_u64(struct cgroup_subsys_state *css,
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struct cftype *cft, struct seq_file *sf)
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static int tg_print_conf_u64(struct seq_file *sf, void *v)
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{
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blkcg_print_blkgs(sf, css_to_blkcg(css), tg_prfill_conf_u64,
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&blkcg_policy_throtl, cft->private, false);
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blkcg_print_blkgs(sf, css_to_blkcg(seq_css(sf)), tg_prfill_conf_u64,
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&blkcg_policy_throtl, seq_cft(sf)->private, false);
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return 0;
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}
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static int tg_print_conf_uint(struct cgroup_subsys_state *css,
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struct cftype *cft, struct seq_file *sf)
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static int tg_print_conf_uint(struct seq_file *sf, void *v)
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{
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blkcg_print_blkgs(sf, css_to_blkcg(css), tg_prfill_conf_uint,
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&blkcg_policy_throtl, cft->private, false);
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blkcg_print_blkgs(sf, css_to_blkcg(seq_css(sf)), tg_prfill_conf_uint,
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&blkcg_policy_throtl, seq_cft(sf)->private, false);
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return 0;
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}
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@ -1428,40 +1423,40 @@ static struct cftype throtl_files[] = {
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{
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.name = "throttle.read_bps_device",
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.private = offsetof(struct throtl_grp, bps[READ]),
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.read_seq_string = tg_print_conf_u64,
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.seq_show = tg_print_conf_u64,
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.write_string = tg_set_conf_u64,
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.max_write_len = 256,
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},
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{
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.name = "throttle.write_bps_device",
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.private = offsetof(struct throtl_grp, bps[WRITE]),
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.read_seq_string = tg_print_conf_u64,
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.seq_show = tg_print_conf_u64,
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.write_string = tg_set_conf_u64,
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.max_write_len = 256,
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},
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{
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.name = "throttle.read_iops_device",
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.private = offsetof(struct throtl_grp, iops[READ]),
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.read_seq_string = tg_print_conf_uint,
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.seq_show = tg_print_conf_uint,
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.write_string = tg_set_conf_uint,
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.max_write_len = 256,
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},
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{
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.name = "throttle.write_iops_device",
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.private = offsetof(struct throtl_grp, iops[WRITE]),
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.read_seq_string = tg_print_conf_uint,
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.seq_show = tg_print_conf_uint,
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.write_string = tg_set_conf_uint,
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.max_write_len = 256,
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},
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{
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.name = "throttle.io_service_bytes",
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.private = offsetof(struct tg_stats_cpu, service_bytes),
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.read_seq_string = tg_print_cpu_rwstat,
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.seq_show = tg_print_cpu_rwstat,
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},
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{
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.name = "throttle.io_serviced",
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.private = offsetof(struct tg_stats_cpu, serviced),
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.read_seq_string = tg_print_cpu_rwstat,
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.seq_show = tg_print_cpu_rwstat,
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},
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{ } /* terminate */
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};
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@ -1632,11 +1632,11 @@ static u64 cfqg_prfill_weight_device(struct seq_file *sf,
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return __blkg_prfill_u64(sf, pd, cfqg->dev_weight);
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}
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static int cfqg_print_weight_device(struct cgroup_subsys_state *css,
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struct cftype *cft, struct seq_file *sf)
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static int cfqg_print_weight_device(struct seq_file *sf, void *v)
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{
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blkcg_print_blkgs(sf, css_to_blkcg(css), cfqg_prfill_weight_device,
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&blkcg_policy_cfq, 0, false);
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blkcg_print_blkgs(sf, css_to_blkcg(seq_css(sf)),
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cfqg_prfill_weight_device, &blkcg_policy_cfq,
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0, false);
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return 0;
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}
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@ -1650,26 +1650,23 @@ static u64 cfqg_prfill_leaf_weight_device(struct seq_file *sf,
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return __blkg_prfill_u64(sf, pd, cfqg->dev_leaf_weight);
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}
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static int cfqg_print_leaf_weight_device(struct cgroup_subsys_state *css,
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struct cftype *cft,
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struct seq_file *sf)
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static int cfqg_print_leaf_weight_device(struct seq_file *sf, void *v)
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{
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blkcg_print_blkgs(sf, css_to_blkcg(css), cfqg_prfill_leaf_weight_device,
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&blkcg_policy_cfq, 0, false);
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blkcg_print_blkgs(sf, css_to_blkcg(seq_css(sf)),
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cfqg_prfill_leaf_weight_device, &blkcg_policy_cfq,
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0, false);
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return 0;
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}
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static int cfq_print_weight(struct cgroup_subsys_state *css, struct cftype *cft,
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struct seq_file *sf)
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static int cfq_print_weight(struct seq_file *sf, void *v)
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{
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seq_printf(sf, "%u\n", css_to_blkcg(css)->cfq_weight);
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seq_printf(sf, "%u\n", css_to_blkcg(seq_css(sf))->cfq_weight);
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return 0;
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}
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static int cfq_print_leaf_weight(struct cgroup_subsys_state *css,
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struct cftype *cft, struct seq_file *sf)
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static int cfq_print_leaf_weight(struct seq_file *sf, void *v)
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{
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seq_printf(sf, "%u\n", css_to_blkcg(css)->cfq_leaf_weight);
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seq_printf(sf, "%u\n", css_to_blkcg(seq_css(sf))->cfq_leaf_weight);
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return 0;
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}
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@ -1762,23 +1759,17 @@ static int cfq_set_leaf_weight(struct cgroup_subsys_state *css,
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return __cfq_set_weight(css, cft, val, true);
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}
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static int cfqg_print_stat(struct cgroup_subsys_state *css, struct cftype *cft,
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struct seq_file *sf)
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static int cfqg_print_stat(struct seq_file *sf, void *v)
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{
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struct blkcg *blkcg = css_to_blkcg(css);
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blkcg_print_blkgs(sf, blkcg, blkg_prfill_stat, &blkcg_policy_cfq,
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cft->private, false);
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blkcg_print_blkgs(sf, css_to_blkcg(seq_css(sf)), blkg_prfill_stat,
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&blkcg_policy_cfq, seq_cft(sf)->private, false);
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return 0;
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}
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|
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static int cfqg_print_rwstat(struct cgroup_subsys_state *css,
|
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struct cftype *cft, struct seq_file *sf)
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static int cfqg_print_rwstat(struct seq_file *sf, void *v)
|
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{
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struct blkcg *blkcg = css_to_blkcg(css);
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|
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blkcg_print_blkgs(sf, blkcg, blkg_prfill_rwstat, &blkcg_policy_cfq,
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cft->private, true);
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blkcg_print_blkgs(sf, css_to_blkcg(seq_css(sf)), blkg_prfill_rwstat,
|
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&blkcg_policy_cfq, seq_cft(sf)->private, true);
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return 0;
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}
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|
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@ -1798,23 +1789,19 @@ static u64 cfqg_prfill_rwstat_recursive(struct seq_file *sf,
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return __blkg_prfill_rwstat(sf, pd, &sum);
|
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}
|
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|
||||
static int cfqg_print_stat_recursive(struct cgroup_subsys_state *css,
|
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struct cftype *cft, struct seq_file *sf)
|
||||
static int cfqg_print_stat_recursive(struct seq_file *sf, void *v)
|
||||
{
|
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struct blkcg *blkcg = css_to_blkcg(css);
|
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|
||||
blkcg_print_blkgs(sf, blkcg, cfqg_prfill_stat_recursive,
|
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&blkcg_policy_cfq, cft->private, false);
|
||||
blkcg_print_blkgs(sf, css_to_blkcg(seq_css(sf)),
|
||||
cfqg_prfill_stat_recursive, &blkcg_policy_cfq,
|
||||
seq_cft(sf)->private, false);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int cfqg_print_rwstat_recursive(struct cgroup_subsys_state *css,
|
||||
struct cftype *cft, struct seq_file *sf)
|
||||
static int cfqg_print_rwstat_recursive(struct seq_file *sf, void *v)
|
||||
{
|
||||
struct blkcg *blkcg = css_to_blkcg(css);
|
||||
|
||||
blkcg_print_blkgs(sf, blkcg, cfqg_prfill_rwstat_recursive,
|
||||
&blkcg_policy_cfq, cft->private, true);
|
||||
blkcg_print_blkgs(sf, css_to_blkcg(seq_css(sf)),
|
||||
cfqg_prfill_rwstat_recursive, &blkcg_policy_cfq,
|
||||
seq_cft(sf)->private, true);
|
||||
return 0;
|
||||
}
|
||||
|
||||
@ -1835,13 +1822,11 @@ static u64 cfqg_prfill_avg_queue_size(struct seq_file *sf,
|
||||
}
|
||||
|
||||
/* print avg_queue_size */
|
||||
static int cfqg_print_avg_queue_size(struct cgroup_subsys_state *css,
|
||||
struct cftype *cft, struct seq_file *sf)
|
||||
static int cfqg_print_avg_queue_size(struct seq_file *sf, void *v)
|
||||
{
|
||||
struct blkcg *blkcg = css_to_blkcg(css);
|
||||
|
||||
blkcg_print_blkgs(sf, blkcg, cfqg_prfill_avg_queue_size,
|
||||
&blkcg_policy_cfq, 0, false);
|
||||
blkcg_print_blkgs(sf, css_to_blkcg(seq_css(sf)),
|
||||
cfqg_prfill_avg_queue_size, &blkcg_policy_cfq,
|
||||
0, false);
|
||||
return 0;
|
||||
}
|
||||
#endif /* CONFIG_DEBUG_BLK_CGROUP */
|
||||
@ -1851,14 +1836,14 @@ static struct cftype cfq_blkcg_files[] = {
|
||||
{
|
||||
.name = "weight_device",
|
||||
.flags = CFTYPE_ONLY_ON_ROOT,
|
||||
.read_seq_string = cfqg_print_leaf_weight_device,
|
||||
.seq_show = cfqg_print_leaf_weight_device,
|
||||
.write_string = cfqg_set_leaf_weight_device,
|
||||
.max_write_len = 256,
|
||||
},
|
||||
{
|
||||
.name = "weight",
|
||||
.flags = CFTYPE_ONLY_ON_ROOT,
|
||||
.read_seq_string = cfq_print_leaf_weight,
|
||||
.seq_show = cfq_print_leaf_weight,
|
||||
.write_u64 = cfq_set_leaf_weight,
|
||||
},
|
||||
|
||||
@ -1866,26 +1851,26 @@ static struct cftype cfq_blkcg_files[] = {
|
||||
{
|
||||
.name = "weight_device",
|
||||
.flags = CFTYPE_NOT_ON_ROOT,
|
||||
.read_seq_string = cfqg_print_weight_device,
|
||||
.seq_show = cfqg_print_weight_device,
|
||||
.write_string = cfqg_set_weight_device,
|
||||
.max_write_len = 256,
|
||||
},
|
||||
{
|
||||
.name = "weight",
|
||||
.flags = CFTYPE_NOT_ON_ROOT,
|
||||
.read_seq_string = cfq_print_weight,
|
||||
.seq_show = cfq_print_weight,
|
||||
.write_u64 = cfq_set_weight,
|
||||
},
|
||||
|
||||
{
|
||||
.name = "leaf_weight_device",
|
||||
.read_seq_string = cfqg_print_leaf_weight_device,
|
||||
.seq_show = cfqg_print_leaf_weight_device,
|
||||
.write_string = cfqg_set_leaf_weight_device,
|
||||
.max_write_len = 256,
|
||||
},
|
||||
{
|
||||
.name = "leaf_weight",
|
||||
.read_seq_string = cfq_print_leaf_weight,
|
||||
.seq_show = cfq_print_leaf_weight,
|
||||
.write_u64 = cfq_set_leaf_weight,
|
||||
},
|
||||
|
||||
@ -1893,114 +1878,114 @@ static struct cftype cfq_blkcg_files[] = {
|
||||
{
|
||||
.name = "time",
|
||||
.private = offsetof(struct cfq_group, stats.time),
|
||||
.read_seq_string = cfqg_print_stat,
|
||||
.seq_show = cfqg_print_stat,
|
||||
},
|
||||
{
|
||||
.name = "sectors",
|
||||
.private = offsetof(struct cfq_group, stats.sectors),
|
||||
.read_seq_string = cfqg_print_stat,
|
||||
.seq_show = cfqg_print_stat,
|
||||
},
|
||||
{
|
||||
.name = "io_service_bytes",
|
||||
.private = offsetof(struct cfq_group, stats.service_bytes),
|
||||
.read_seq_string = cfqg_print_rwstat,
|
||||
.seq_show = cfqg_print_rwstat,
|
||||
},
|
||||
{
|
||||
.name = "io_serviced",
|
||||
.private = offsetof(struct cfq_group, stats.serviced),
|
||||
.read_seq_string = cfqg_print_rwstat,
|
||||
.seq_show = cfqg_print_rwstat,
|
||||
},
|
||||
{
|
||||
.name = "io_service_time",
|
||||
.private = offsetof(struct cfq_group, stats.service_time),
|
||||
.read_seq_string = cfqg_print_rwstat,
|
||||
.seq_show = cfqg_print_rwstat,
|
||||
},
|
||||
{
|
||||
.name = "io_wait_time",
|
||||
.private = offsetof(struct cfq_group, stats.wait_time),
|
||||
.read_seq_string = cfqg_print_rwstat,
|
||||
.seq_show = cfqg_print_rwstat,
|
||||
},
|
||||
{
|
||||
.name = "io_merged",
|
||||
.private = offsetof(struct cfq_group, stats.merged),
|
||||
.read_seq_string = cfqg_print_rwstat,
|
||||
.seq_show = cfqg_print_rwstat,
|
||||
},
|
||||
{
|
||||
.name = "io_queued",
|
||||
.private = offsetof(struct cfq_group, stats.queued),
|
||||
.read_seq_string = cfqg_print_rwstat,
|
||||
.seq_show = cfqg_print_rwstat,
|
||||
},
|
||||
|
||||
/* the same statictics which cover the cfqg and its descendants */
|
||||
{
|
||||
.name = "time_recursive",
|
||||
.private = offsetof(struct cfq_group, stats.time),
|
||||
.read_seq_string = cfqg_print_stat_recursive,
|
||||
.seq_show = cfqg_print_stat_recursive,
|
||||
},
|
||||
{
|
||||
.name = "sectors_recursive",
|
||||
.private = offsetof(struct cfq_group, stats.sectors),
|
||||
.read_seq_string = cfqg_print_stat_recursive,
|
||||
.seq_show = cfqg_print_stat_recursive,
|
||||
},
|
||||
{
|
||||
.name = "io_service_bytes_recursive",
|
||||
.private = offsetof(struct cfq_group, stats.service_bytes),
|
||||
.read_seq_string = cfqg_print_rwstat_recursive,
|
||||
.seq_show = cfqg_print_rwstat_recursive,
|
||||
},
|
||||
{
|
||||
.name = "io_serviced_recursive",
|
||||
.private = offsetof(struct cfq_group, stats.serviced),
|
||||
.read_seq_string = cfqg_print_rwstat_recursive,
|
||||
.seq_show = cfqg_print_rwstat_recursive,
|
||||
},
|
||||
{
|
||||
.name = "io_service_time_recursive",
|
||||
.private = offsetof(struct cfq_group, stats.service_time),
|
||||
.read_seq_string = cfqg_print_rwstat_recursive,
|
||||
.seq_show = cfqg_print_rwstat_recursive,
|
||||
},
|
||||
{
|
||||
.name = "io_wait_time_recursive",
|
||||
.private = offsetof(struct cfq_group, stats.wait_time),
|
||||
.read_seq_string = cfqg_print_rwstat_recursive,
|
||||
.seq_show = cfqg_print_rwstat_recursive,
|
||||
},
|
||||
{
|
||||
.name = "io_merged_recursive",
|
||||
.private = offsetof(struct cfq_group, stats.merged),
|
||||
.read_seq_string = cfqg_print_rwstat_recursive,
|
||||
.seq_show = cfqg_print_rwstat_recursive,
|
||||
},
|
||||
{
|
||||
.name = "io_queued_recursive",
|
||||
.private = offsetof(struct cfq_group, stats.queued),
|
||||
.read_seq_string = cfqg_print_rwstat_recursive,
|
||||
.seq_show = cfqg_print_rwstat_recursive,
|
||||
},
|
||||
#ifdef CONFIG_DEBUG_BLK_CGROUP
|
||||
{
|
||||
.name = "avg_queue_size",
|
||||
.read_seq_string = cfqg_print_avg_queue_size,
|
||||
.seq_show = cfqg_print_avg_queue_size,
|
||||
},
|
||||
{
|
||||
.name = "group_wait_time",
|
||||
.private = offsetof(struct cfq_group, stats.group_wait_time),
|
||||
.read_seq_string = cfqg_print_stat,
|
||||
.seq_show = cfqg_print_stat,
|
||||
},
|
||||
{
|
||||
.name = "idle_time",
|
||||
.private = offsetof(struct cfq_group, stats.idle_time),
|
||||
.read_seq_string = cfqg_print_stat,
|
||||
.seq_show = cfqg_print_stat,
|
||||
},
|
||||
{
|
||||
.name = "empty_time",
|
||||
.private = offsetof(struct cfq_group, stats.empty_time),
|
||||
.read_seq_string = cfqg_print_stat,
|
||||
.seq_show = cfqg_print_stat,
|
||||
},
|
||||
{
|
||||
.name = "dequeue",
|
||||
.private = offsetof(struct cfq_group, stats.dequeue),
|
||||
.read_seq_string = cfqg_print_stat,
|
||||
.seq_show = cfqg_print_stat,
|
||||
},
|
||||
{
|
||||
.name = "unaccounted_time",
|
||||
.private = offsetof(struct cfq_group, stats.unaccounted_time),
|
||||
.read_seq_string = cfqg_print_stat,
|
||||
.seq_show = cfqg_print_stat,
|
||||
},
|
||||
#endif /* CONFIG_DEBUG_BLK_CGROUP */
|
||||
{ } /* terminate */
|
||||
|
||||
@ -163,7 +163,6 @@ static struct cgroup_subsys_state *bcachecg_create(struct cgroup *cgroup)
|
||||
static void bcachecg_destroy(struct cgroup *cgroup)
|
||||
{
|
||||
struct bch_cgroup *cg = cgroup_to_bcache(cgroup);
|
||||
free_css_id(&bcache_subsys, &cg->css);
|
||||
kfree(cg);
|
||||
}
|
||||
|
||||
|
||||
@ -21,6 +21,7 @@
|
||||
#include <linux/xattr.h>
|
||||
#include <linux/fs.h>
|
||||
#include <linux/percpu-refcount.h>
|
||||
#include <linux/seq_file.h>
|
||||
|
||||
#ifdef CONFIG_CGROUPS
|
||||
|
||||
@ -28,8 +29,6 @@ struct cgroupfs_root;
|
||||
struct cgroup_subsys;
|
||||
struct inode;
|
||||
struct cgroup;
|
||||
struct css_id;
|
||||
struct eventfd_ctx;
|
||||
|
||||
extern int cgroup_init_early(void);
|
||||
extern int cgroup_init(void);
|
||||
@ -79,8 +78,6 @@ struct cgroup_subsys_state {
|
||||
struct cgroup_subsys_state *parent;
|
||||
|
||||
unsigned long flags;
|
||||
/* ID for this css, if possible */
|
||||
struct css_id __rcu *id;
|
||||
|
||||
/* percpu_ref killing and RCU release */
|
||||
struct rcu_head rcu_head;
|
||||
@ -239,10 +236,6 @@ struct cgroup {
|
||||
struct rcu_head rcu_head;
|
||||
struct work_struct destroy_work;
|
||||
|
||||
/* List of events which userspace want to receive */
|
||||
struct list_head event_list;
|
||||
spinlock_t event_list_lock;
|
||||
|
||||
/* directory xattrs */
|
||||
struct simple_xattrs xattrs;
|
||||
};
|
||||
@ -280,6 +273,9 @@ enum {
|
||||
* - "tasks" is removed. Everything should be at process
|
||||
* granularity. Use "cgroup.procs" instead.
|
||||
*
|
||||
* - "cgroup.procs" is not sorted. pids will be unique unless they
|
||||
* got recycled inbetween reads.
|
||||
*
|
||||
* - "release_agent" and "notify_on_release" are removed.
|
||||
* Replacement notification mechanism will be implemented.
|
||||
*
|
||||
@ -320,9 +316,6 @@ struct cgroupfs_root {
|
||||
/* Unique id for this hierarchy. */
|
||||
int hierarchy_id;
|
||||
|
||||
/* A list running through the attached subsystems */
|
||||
struct list_head subsys_list;
|
||||
|
||||
/* The root cgroup for this hierarchy */
|
||||
struct cgroup top_cgroup;
|
||||
|
||||
@ -388,16 +381,6 @@ struct css_set {
|
||||
struct rcu_head rcu_head;
|
||||
};
|
||||
|
||||
/*
|
||||
* cgroup_map_cb is an abstract callback API for reporting map-valued
|
||||
* control files
|
||||
*/
|
||||
|
||||
struct cgroup_map_cb {
|
||||
int (*fill)(struct cgroup_map_cb *cb, const char *key, u64 value);
|
||||
void *state;
|
||||
};
|
||||
|
||||
/*
|
||||
* struct cftype: handler definitions for cgroup control files
|
||||
*
|
||||
@ -445,10 +428,6 @@ struct cftype {
|
||||
*/
|
||||
struct cgroup_subsys *ss;
|
||||
|
||||
int (*open)(struct inode *inode, struct file *file);
|
||||
ssize_t (*read)(struct cgroup_subsys_state *css, struct cftype *cft,
|
||||
struct file *file,
|
||||
char __user *buf, size_t nbytes, loff_t *ppos);
|
||||
/*
|
||||
* read_u64() is a shortcut for the common case of returning a
|
||||
* single integer. Use it in place of read()
|
||||
@ -458,24 +437,14 @@ struct cftype {
|
||||
* read_s64() is a signed version of read_u64()
|
||||
*/
|
||||
s64 (*read_s64)(struct cgroup_subsys_state *css, struct cftype *cft);
|
||||
/*
|
||||
* read_map() is used for defining a map of key/value
|
||||
* pairs. It should call cb->fill(cb, key, value) for each
|
||||
* entry. The key/value pairs (and their ordering) should not
|
||||
* change between reboots.
|
||||
*/
|
||||
int (*read_map)(struct cgroup_subsys_state *css, struct cftype *cft,
|
||||
struct cgroup_map_cb *cb);
|
||||
/*
|
||||
* read_seq_string() is used for outputting a simple sequence
|
||||
* using seqfile.
|
||||
*/
|
||||
int (*read_seq_string)(struct cgroup_subsys_state *css,
|
||||
struct cftype *cft, struct seq_file *m);
|
||||
|
||||
ssize_t (*write)(struct cgroup_subsys_state *css, struct cftype *cft,
|
||||
struct file *file,
|
||||
const char __user *buf, size_t nbytes, loff_t *ppos);
|
||||
/* generic seq_file read interface */
|
||||
int (*seq_show)(struct seq_file *sf, void *v);
|
||||
|
||||
/* optional ops, implement all or none */
|
||||
void *(*seq_start)(struct seq_file *sf, loff_t *ppos);
|
||||
void *(*seq_next)(struct seq_file *sf, void *v, loff_t *ppos);
|
||||
void (*seq_stop)(struct seq_file *sf, void *v);
|
||||
|
||||
/*
|
||||
* write_u64() is a shortcut for the common case of accepting
|
||||
@ -504,27 +473,6 @@ struct cftype {
|
||||
* kick type for multiplexing.
|
||||
*/
|
||||
int (*trigger)(struct cgroup_subsys_state *css, unsigned int event);
|
||||
|
||||
int (*release)(struct inode *inode, struct file *file);
|
||||
|
||||
/*
|
||||
* register_event() callback will be used to add new userspace
|
||||
* waiter for changes related to the cftype. Implement it if
|
||||
* you want to provide this functionality. Use eventfd_signal()
|
||||
* on eventfd to send notification to userspace.
|
||||
*/
|
||||
int (*register_event)(struct cgroup_subsys_state *css,
|
||||
struct cftype *cft, struct eventfd_ctx *eventfd,
|
||||
const char *args);
|
||||
/*
|
||||
* unregister_event() callback will be called when userspace
|
||||
* closes the eventfd or on cgroup removing.
|
||||
* This callback must be implemented, if you want provide
|
||||
* notification functionality.
|
||||
*/
|
||||
void (*unregister_event)(struct cgroup_subsys_state *css,
|
||||
struct cftype *cft,
|
||||
struct eventfd_ctx *eventfd);
|
||||
};
|
||||
|
||||
/*
|
||||
@ -537,6 +485,26 @@ struct cftype_set {
|
||||
struct cftype *cfts;
|
||||
};
|
||||
|
||||
/*
|
||||
* cgroupfs file entry, pointed to from leaf dentry->d_fsdata. Don't
|
||||
* access directly.
|
||||
*/
|
||||
struct cfent {
|
||||
struct list_head node;
|
||||
struct dentry *dentry;
|
||||
struct cftype *type;
|
||||
struct cgroup_subsys_state *css;
|
||||
|
||||
/* file xattrs */
|
||||
struct simple_xattrs xattrs;
|
||||
};
|
||||
|
||||
/* seq_file->private points to the following, only ->priv is public */
|
||||
struct cgroup_open_file {
|
||||
struct cfent *cfe;
|
||||
void *priv;
|
||||
};
|
||||
|
||||
/*
|
||||
* See the comment above CGRP_ROOT_SANE_BEHAVIOR for details. This
|
||||
* function can be called as long as @cgrp is accessible.
|
||||
@ -552,6 +520,18 @@ static inline const char *cgroup_name(const struct cgroup *cgrp)
|
||||
return rcu_dereference(cgrp->name)->name;
|
||||
}
|
||||
|
||||
static inline struct cgroup_subsys_state *seq_css(struct seq_file *seq)
|
||||
{
|
||||
struct cgroup_open_file *of = seq->private;
|
||||
return of->cfe->css;
|
||||
}
|
||||
|
||||
static inline struct cftype *seq_cft(struct seq_file *seq)
|
||||
{
|
||||
struct cgroup_open_file *of = seq->private;
|
||||
return of->cfe->type;
|
||||
}
|
||||
|
||||
int cgroup_add_cftypes(struct cgroup_subsys *ss, struct cftype *cfts);
|
||||
int cgroup_rm_cftypes(struct cftype *cfts);
|
||||
|
||||
@ -631,12 +611,8 @@ struct cgroup_subsys {
|
||||
#define MAX_CGROUP_TYPE_NAMELEN 32
|
||||
const char *name;
|
||||
|
||||
/*
|
||||
* Link to parent, and list entry in parent's children.
|
||||
* Protected by cgroup_lock()
|
||||
*/
|
||||
/* link to parent, protected by cgroup_lock() */
|
||||
struct cgroupfs_root *root;
|
||||
struct list_head sibling;
|
||||
|
||||
/* list of cftype_sets */
|
||||
struct list_head cftsets;
|
||||
|
||||
@ -7,6 +7,7 @@
|
||||
#include <linux/gfp.h>
|
||||
#include <linux/types.h>
|
||||
#include <linux/cgroup.h>
|
||||
#include <linux/eventfd.h>
|
||||
|
||||
struct vmpressure {
|
||||
unsigned long scanned;
|
||||
@ -33,13 +34,10 @@ extern void vmpressure_init(struct vmpressure *vmpr);
|
||||
extern void vmpressure_cleanup(struct vmpressure *vmpr);
|
||||
extern struct vmpressure *memcg_to_vmpressure(struct mem_cgroup *memcg);
|
||||
extern struct cgroup_subsys_state *vmpressure_to_css(struct vmpressure *vmpr);
|
||||
extern struct vmpressure *css_to_vmpressure(struct cgroup_subsys_state *css);
|
||||
extern int vmpressure_register_event(struct cgroup_subsys_state *css,
|
||||
struct cftype *cft,
|
||||
extern int vmpressure_register_event(struct mem_cgroup *memcg,
|
||||
struct eventfd_ctx *eventfd,
|
||||
const char *args);
|
||||
extern void vmpressure_unregister_event(struct cgroup_subsys_state *css,
|
||||
struct cftype *cft,
|
||||
extern void vmpressure_unregister_event(struct mem_cgroup *memcg,
|
||||
struct eventfd_ctx *eventfd);
|
||||
#else
|
||||
static inline void vmpressure(gfp_t gfp, struct mem_cgroup *memcg,
|
||||
|
||||
@ -854,7 +854,6 @@ config NUMA_BALANCING
|
||||
|
||||
menuconfig CGROUPS
|
||||
boolean "Control Group support"
|
||||
depends on EVENTFD
|
||||
help
|
||||
This option adds support for grouping sets of processes together, for
|
||||
use with process control subsystems such as Cpusets, CFS, memory
|
||||
@ -921,6 +920,7 @@ config MEMCG
|
||||
bool "Memory Resource Controller for Control Groups"
|
||||
depends on RESOURCE_COUNTERS
|
||||
select MM_OWNER
|
||||
select EVENTFD
|
||||
help
|
||||
Provides a memory resource controller that manages both anonymous
|
||||
memory and page cache. (See Documentation/cgroups/memory.txt)
|
||||
@ -1160,7 +1160,6 @@ config UIDGID_STRICT_TYPE_CHECKS
|
||||
|
||||
config SCHED_AUTOGROUP
|
||||
bool "Automatic process group scheduling"
|
||||
select EVENTFD
|
||||
select CGROUPS
|
||||
select CGROUP_SCHED
|
||||
select FAIR_GROUP_SCHED
|
||||
|
||||
1212
kernel/cgroup.c
1212
kernel/cgroup.c
File diff suppressed because it is too large
Load Diff
@ -301,10 +301,9 @@ out_unlock:
|
||||
spin_unlock_irq(&freezer->lock);
|
||||
}
|
||||
|
||||
static int freezer_read(struct cgroup_subsys_state *css, struct cftype *cft,
|
||||
struct seq_file *m)
|
||||
static int freezer_read(struct seq_file *m, void *v)
|
||||
{
|
||||
struct cgroup_subsys_state *pos;
|
||||
struct cgroup_subsys_state *css = seq_css(m), *pos;
|
||||
|
||||
rcu_read_lock();
|
||||
|
||||
@ -458,7 +457,7 @@ static struct cftype files[] = {
|
||||
{
|
||||
.name = "state",
|
||||
.flags = CFTYPE_NOT_ON_ROOT,
|
||||
.read_seq_string = freezer_read,
|
||||
.seq_show = freezer_read,
|
||||
.write_string = freezer_write,
|
||||
},
|
||||
{
|
||||
|
||||
@ -1731,66 +1731,41 @@ out_unlock:
|
||||
* used, list of ranges of sequential numbers, is variable length,
|
||||
* and since these maps can change value dynamically, one could read
|
||||
* gibberish by doing partial reads while a list was changing.
|
||||
* A single large read to a buffer that crosses a page boundary is
|
||||
* ok, because the result being copied to user land is not recomputed
|
||||
* across a page fault.
|
||||
*/
|
||||
|
||||
static size_t cpuset_sprintf_cpulist(char *page, struct cpuset *cs)
|
||||
static int cpuset_common_seq_show(struct seq_file *sf, void *v)
|
||||
{
|
||||
size_t count;
|
||||
struct cpuset *cs = css_cs(seq_css(sf));
|
||||
cpuset_filetype_t type = seq_cft(sf)->private;
|
||||
ssize_t count;
|
||||
char *buf, *s;
|
||||
int ret = 0;
|
||||
|
||||
count = seq_get_buf(sf, &buf);
|
||||
s = buf;
|
||||
|
||||
mutex_lock(&callback_mutex);
|
||||
count = cpulist_scnprintf(page, PAGE_SIZE, cs->cpus_allowed);
|
||||
mutex_unlock(&callback_mutex);
|
||||
|
||||
return count;
|
||||
}
|
||||
|
||||
static size_t cpuset_sprintf_memlist(char *page, struct cpuset *cs)
|
||||
{
|
||||
size_t count;
|
||||
|
||||
mutex_lock(&callback_mutex);
|
||||
count = nodelist_scnprintf(page, PAGE_SIZE, cs->mems_allowed);
|
||||
mutex_unlock(&callback_mutex);
|
||||
|
||||
return count;
|
||||
}
|
||||
|
||||
static ssize_t cpuset_common_file_read(struct cgroup_subsys_state *css,
|
||||
struct cftype *cft, struct file *file,
|
||||
char __user *buf, size_t nbytes,
|
||||
loff_t *ppos)
|
||||
{
|
||||
struct cpuset *cs = css_cs(css);
|
||||
cpuset_filetype_t type = cft->private;
|
||||
char *page;
|
||||
ssize_t retval = 0;
|
||||
char *s;
|
||||
|
||||
if (!(page = (char *)__get_free_page(GFP_TEMPORARY)))
|
||||
return -ENOMEM;
|
||||
|
||||
s = page;
|
||||
|
||||
switch (type) {
|
||||
case FILE_CPULIST:
|
||||
s += cpuset_sprintf_cpulist(s, cs);
|
||||
s += cpulist_scnprintf(s, count, cs->cpus_allowed);
|
||||
break;
|
||||
case FILE_MEMLIST:
|
||||
s += cpuset_sprintf_memlist(s, cs);
|
||||
s += nodelist_scnprintf(s, count, cs->mems_allowed);
|
||||
break;
|
||||
default:
|
||||
retval = -EINVAL;
|
||||
goto out;
|
||||
ret = -EINVAL;
|
||||
goto out_unlock;
|
||||
}
|
||||
*s++ = '\n';
|
||||
|
||||
retval = simple_read_from_buffer(buf, nbytes, ppos, page, s - page);
|
||||
out:
|
||||
free_page((unsigned long)page);
|
||||
return retval;
|
||||
if (s < buf + count - 1) {
|
||||
*s++ = '\n';
|
||||
seq_commit(sf, s - buf);
|
||||
} else {
|
||||
seq_commit(sf, -1);
|
||||
}
|
||||
out_unlock:
|
||||
mutex_unlock(&callback_mutex);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static u64 cpuset_read_u64(struct cgroup_subsys_state *css, struct cftype *cft)
|
||||
@ -1847,7 +1822,7 @@ static s64 cpuset_read_s64(struct cgroup_subsys_state *css, struct cftype *cft)
|
||||
static struct cftype files[] = {
|
||||
{
|
||||
.name = "cpus",
|
||||
.read = cpuset_common_file_read,
|
||||
.seq_show = cpuset_common_seq_show,
|
||||
.write_string = cpuset_write_resmask,
|
||||
.max_write_len = (100U + 6 * NR_CPUS),
|
||||
.private = FILE_CPULIST,
|
||||
@ -1855,7 +1830,7 @@ static struct cftype files[] = {
|
||||
|
||||
{
|
||||
.name = "mems",
|
||||
.read = cpuset_common_file_read,
|
||||
.seq_show = cpuset_common_seq_show,
|
||||
.write_string = cpuset_write_resmask,
|
||||
.max_write_len = (100U + 6 * MAX_NUMNODES),
|
||||
.private = FILE_MEMLIST,
|
||||
|
||||
@ -7852,15 +7852,14 @@ static int __cfs_schedulable(struct task_group *tg, u64 period, u64 quota)
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int cpu_stats_show(struct cgroup_subsys_state *css, struct cftype *cft,
|
||||
struct cgroup_map_cb *cb)
|
||||
static int cpu_stats_show(struct seq_file *sf, void *v)
|
||||
{
|
||||
struct task_group *tg = css_tg(css);
|
||||
struct task_group *tg = css_tg(seq_css(sf));
|
||||
struct cfs_bandwidth *cfs_b = &tg->cfs_bandwidth;
|
||||
|
||||
cb->fill(cb, "nr_periods", cfs_b->nr_periods);
|
||||
cb->fill(cb, "nr_throttled", cfs_b->nr_throttled);
|
||||
cb->fill(cb, "throttled_time", cfs_b->throttled_time);
|
||||
seq_printf(sf, "nr_periods %d\n", cfs_b->nr_periods);
|
||||
seq_printf(sf, "nr_throttled %d\n", cfs_b->nr_throttled);
|
||||
seq_printf(sf, "throttled_time %llu\n", cfs_b->throttled_time);
|
||||
|
||||
return 0;
|
||||
}
|
||||
@ -7914,7 +7913,7 @@ static struct cftype cpu_files[] = {
|
||||
},
|
||||
{
|
||||
.name = "stat",
|
||||
.read_map = cpu_stats_show,
|
||||
.seq_show = cpu_stats_show,
|
||||
},
|
||||
#endif
|
||||
#ifdef CONFIG_RT_GROUP_SCHED
|
||||
|
||||
@ -163,10 +163,9 @@ out:
|
||||
return err;
|
||||
}
|
||||
|
||||
static int cpuacct_percpu_seq_read(struct cgroup_subsys_state *css,
|
||||
struct cftype *cft, struct seq_file *m)
|
||||
static int cpuacct_percpu_seq_show(struct seq_file *m, void *V)
|
||||
{
|
||||
struct cpuacct *ca = css_ca(css);
|
||||
struct cpuacct *ca = css_ca(seq_css(m));
|
||||
u64 percpu;
|
||||
int i;
|
||||
|
||||
@ -183,10 +182,9 @@ static const char * const cpuacct_stat_desc[] = {
|
||||
[CPUACCT_STAT_SYSTEM] = "system",
|
||||
};
|
||||
|
||||
static int cpuacct_stats_show(struct cgroup_subsys_state *css,
|
||||
struct cftype *cft, struct cgroup_map_cb *cb)
|
||||
static int cpuacct_stats_show(struct seq_file *sf, void *v)
|
||||
{
|
||||
struct cpuacct *ca = css_ca(css);
|
||||
struct cpuacct *ca = css_ca(seq_css(sf));
|
||||
int cpu;
|
||||
s64 val = 0;
|
||||
|
||||
@ -196,7 +194,7 @@ static int cpuacct_stats_show(struct cgroup_subsys_state *css,
|
||||
val += kcpustat->cpustat[CPUTIME_NICE];
|
||||
}
|
||||
val = cputime64_to_clock_t(val);
|
||||
cb->fill(cb, cpuacct_stat_desc[CPUACCT_STAT_USER], val);
|
||||
seq_printf(sf, "%s %lld\n", cpuacct_stat_desc[CPUACCT_STAT_USER], val);
|
||||
|
||||
val = 0;
|
||||
for_each_online_cpu(cpu) {
|
||||
@ -207,7 +205,7 @@ static int cpuacct_stats_show(struct cgroup_subsys_state *css,
|
||||
}
|
||||
|
||||
val = cputime64_to_clock_t(val);
|
||||
cb->fill(cb, cpuacct_stat_desc[CPUACCT_STAT_SYSTEM], val);
|
||||
seq_printf(sf, "%s %lld\n", cpuacct_stat_desc[CPUACCT_STAT_SYSTEM], val);
|
||||
|
||||
return 0;
|
||||
}
|
||||
@ -220,11 +218,11 @@ static struct cftype files[] = {
|
||||
},
|
||||
{
|
||||
.name = "usage_percpu",
|
||||
.read_seq_string = cpuacct_percpu_seq_read,
|
||||
.seq_show = cpuacct_percpu_seq_show,
|
||||
},
|
||||
{
|
||||
.name = "stat",
|
||||
.read_map = cpuacct_stats_show,
|
||||
.seq_show = cpuacct_stats_show,
|
||||
},
|
||||
{ } /* terminate */
|
||||
};
|
||||
|
||||
@ -242,22 +242,16 @@ void hugetlb_cgroup_uncharge_cgroup(int idx, unsigned long nr_pages,
|
||||
return;
|
||||
}
|
||||
|
||||
static ssize_t hugetlb_cgroup_read(struct cgroup_subsys_state *css,
|
||||
struct cftype *cft, struct file *file,
|
||||
char __user *buf, size_t nbytes,
|
||||
loff_t *ppos)
|
||||
static u64 hugetlb_cgroup_read_u64(struct cgroup_subsys_state *css,
|
||||
struct cftype *cft)
|
||||
{
|
||||
u64 val;
|
||||
char str[64];
|
||||
int idx, name, len;
|
||||
int idx, name;
|
||||
struct hugetlb_cgroup *h_cg = hugetlb_cgroup_from_css(css);
|
||||
|
||||
idx = MEMFILE_IDX(cft->private);
|
||||
name = MEMFILE_ATTR(cft->private);
|
||||
|
||||
val = res_counter_read_u64(&h_cg->hugepage[idx], name);
|
||||
len = scnprintf(str, sizeof(str), "%llu\n", (unsigned long long)val);
|
||||
return simple_read_from_buffer(buf, nbytes, ppos, str, len);
|
||||
return res_counter_read_u64(&h_cg->hugepage[idx], name);
|
||||
}
|
||||
|
||||
static int hugetlb_cgroup_write(struct cgroup_subsys_state *css,
|
||||
@ -337,28 +331,28 @@ static void __init __hugetlb_cgroup_file_init(int idx)
|
||||
cft = &h->cgroup_files[0];
|
||||
snprintf(cft->name, MAX_CFTYPE_NAME, "%s.limit_in_bytes", buf);
|
||||
cft->private = MEMFILE_PRIVATE(idx, RES_LIMIT);
|
||||
cft->read = hugetlb_cgroup_read;
|
||||
cft->read_u64 = hugetlb_cgroup_read_u64;
|
||||
cft->write_string = hugetlb_cgroup_write;
|
||||
|
||||
/* Add the usage file */
|
||||
cft = &h->cgroup_files[1];
|
||||
snprintf(cft->name, MAX_CFTYPE_NAME, "%s.usage_in_bytes", buf);
|
||||
cft->private = MEMFILE_PRIVATE(idx, RES_USAGE);
|
||||
cft->read = hugetlb_cgroup_read;
|
||||
cft->read_u64 = hugetlb_cgroup_read_u64;
|
||||
|
||||
/* Add the MAX usage file */
|
||||
cft = &h->cgroup_files[2];
|
||||
snprintf(cft->name, MAX_CFTYPE_NAME, "%s.max_usage_in_bytes", buf);
|
||||
cft->private = MEMFILE_PRIVATE(idx, RES_MAX_USAGE);
|
||||
cft->trigger = hugetlb_cgroup_reset;
|
||||
cft->read = hugetlb_cgroup_read;
|
||||
cft->read_u64 = hugetlb_cgroup_read_u64;
|
||||
|
||||
/* Add the failcntfile */
|
||||
cft = &h->cgroup_files[3];
|
||||
snprintf(cft->name, MAX_CFTYPE_NAME, "%s.failcnt", buf);
|
||||
cft->private = MEMFILE_PRIVATE(idx, RES_FAILCNT);
|
||||
cft->trigger = hugetlb_cgroup_reset;
|
||||
cft->read = hugetlb_cgroup_read;
|
||||
cft->read_u64 = hugetlb_cgroup_read_u64;
|
||||
|
||||
/* NULL terminate the last cft */
|
||||
cft = &h->cgroup_files[4];
|
||||
|
||||
428
mm/memcontrol.c
428
mm/memcontrol.c
@ -45,6 +45,7 @@
|
||||
#include <linux/swapops.h>
|
||||
#include <linux/spinlock.h>
|
||||
#include <linux/eventfd.h>
|
||||
#include <linux/poll.h>
|
||||
#include <linux/sort.h>
|
||||
#include <linux/fs.h>
|
||||
#include <linux/seq_file.h>
|
||||
@ -55,6 +56,7 @@
|
||||
#include <linux/cpu.h>
|
||||
#include <linux/oom.h>
|
||||
#include <linux/lockdep.h>
|
||||
#include <linux/file.h>
|
||||
#include "internal.h"
|
||||
#include <net/sock.h>
|
||||
#include <net/ip.h>
|
||||
@ -227,6 +229,46 @@ struct mem_cgroup_eventfd_list {
|
||||
struct eventfd_ctx *eventfd;
|
||||
};
|
||||
|
||||
/*
|
||||
* cgroup_event represents events which userspace want to receive.
|
||||
*/
|
||||
struct mem_cgroup_event {
|
||||
/*
|
||||
* memcg which the event belongs to.
|
||||
*/
|
||||
struct mem_cgroup *memcg;
|
||||
/*
|
||||
* eventfd to signal userspace about the event.
|
||||
*/
|
||||
struct eventfd_ctx *eventfd;
|
||||
/*
|
||||
* Each of these stored in a list by the cgroup.
|
||||
*/
|
||||
struct list_head list;
|
||||
/*
|
||||
* register_event() callback will be used to add new userspace
|
||||
* waiter for changes related to this event. Use eventfd_signal()
|
||||
* on eventfd to send notification to userspace.
|
||||
*/
|
||||
int (*register_event)(struct mem_cgroup *memcg,
|
||||
struct eventfd_ctx *eventfd, const char *args);
|
||||
/*
|
||||
* unregister_event() callback will be called when userspace closes
|
||||
* the eventfd or on cgroup removing. This callback must be set,
|
||||
* if you want provide notification functionality.
|
||||
*/
|
||||
void (*unregister_event)(struct mem_cgroup *memcg,
|
||||
struct eventfd_ctx *eventfd);
|
||||
/*
|
||||
* All fields below needed to unregister event when
|
||||
* userspace closes eventfd.
|
||||
*/
|
||||
poll_table pt;
|
||||
wait_queue_head_t *wqh;
|
||||
wait_queue_t wait;
|
||||
struct work_struct remove;
|
||||
};
|
||||
|
||||
static void mem_cgroup_threshold(struct mem_cgroup *memcg);
|
||||
static void mem_cgroup_oom_notify(struct mem_cgroup *memcg);
|
||||
|
||||
@ -331,6 +373,10 @@ struct mem_cgroup {
|
||||
atomic_t numainfo_updating;
|
||||
#endif
|
||||
|
||||
/* List of events which userspace want to receive */
|
||||
struct list_head event_list;
|
||||
spinlock_t event_list_lock;
|
||||
|
||||
struct mem_cgroup_per_node *nodeinfo[0];
|
||||
/* WARNING: nodeinfo must be the last member here */
|
||||
};
|
||||
@ -490,11 +536,6 @@ struct cgroup_subsys_state *vmpressure_to_css(struct vmpressure *vmpr)
|
||||
return &container_of(vmpr, struct mem_cgroup, vmpressure)->css;
|
||||
}
|
||||
|
||||
struct vmpressure *css_to_vmpressure(struct cgroup_subsys_state *css)
|
||||
{
|
||||
return &mem_cgroup_from_css(css)->vmpressure;
|
||||
}
|
||||
|
||||
static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg)
|
||||
{
|
||||
return (memcg == root_mem_cgroup);
|
||||
@ -2976,10 +3017,9 @@ static struct kmem_cache *memcg_params_to_cache(struct memcg_cache_params *p)
|
||||
}
|
||||
|
||||
#ifdef CONFIG_SLABINFO
|
||||
static int mem_cgroup_slabinfo_read(struct cgroup_subsys_state *css,
|
||||
struct cftype *cft, struct seq_file *m)
|
||||
static int mem_cgroup_slabinfo_read(struct seq_file *m, void *v)
|
||||
{
|
||||
struct mem_cgroup *memcg = mem_cgroup_from_css(css);
|
||||
struct mem_cgroup *memcg = mem_cgroup_from_css(seq_css(m));
|
||||
struct memcg_cache_params *params;
|
||||
|
||||
if (!memcg_can_account_kmem(memcg))
|
||||
@ -5112,14 +5152,12 @@ static inline u64 mem_cgroup_usage(struct mem_cgroup *memcg, bool swap)
|
||||
return val << PAGE_SHIFT;
|
||||
}
|
||||
|
||||
static ssize_t mem_cgroup_read(struct cgroup_subsys_state *css,
|
||||
struct cftype *cft, struct file *file,
|
||||
char __user *buf, size_t nbytes, loff_t *ppos)
|
||||
static u64 mem_cgroup_read_u64(struct cgroup_subsys_state *css,
|
||||
struct cftype *cft)
|
||||
{
|
||||
struct mem_cgroup *memcg = mem_cgroup_from_css(css);
|
||||
char str[64];
|
||||
u64 val;
|
||||
int name, len;
|
||||
int name;
|
||||
enum res_type type;
|
||||
|
||||
type = MEMFILE_TYPE(cft->private);
|
||||
@ -5145,8 +5183,7 @@ static ssize_t mem_cgroup_read(struct cgroup_subsys_state *css,
|
||||
BUG();
|
||||
}
|
||||
|
||||
len = scnprintf(str, sizeof(str), "%llu\n", (unsigned long long)val);
|
||||
return simple_read_from_buffer(buf, nbytes, ppos, str, len);
|
||||
return val;
|
||||
}
|
||||
|
||||
static int memcg_update_kmem_limit(struct cgroup_subsys_state *css, u64 val)
|
||||
@ -5383,8 +5420,7 @@ static int mem_cgroup_move_charge_write(struct cgroup_subsys_state *css,
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_NUMA
|
||||
static int memcg_numa_stat_show(struct cgroup_subsys_state *css,
|
||||
struct cftype *cft, struct seq_file *m)
|
||||
static int memcg_numa_stat_show(struct seq_file *m, void *v)
|
||||
{
|
||||
struct numa_stat {
|
||||
const char *name;
|
||||
@ -5400,7 +5436,7 @@ static int memcg_numa_stat_show(struct cgroup_subsys_state *css,
|
||||
const struct numa_stat *stat;
|
||||
int nid;
|
||||
unsigned long nr;
|
||||
struct mem_cgroup *memcg = mem_cgroup_from_css(css);
|
||||
struct mem_cgroup *memcg = mem_cgroup_from_css(seq_css(m));
|
||||
|
||||
for (stat = stats; stat < stats + ARRAY_SIZE(stats); stat++) {
|
||||
nr = mem_cgroup_nr_lru_pages(memcg, stat->lru_mask);
|
||||
@ -5439,10 +5475,9 @@ static inline void mem_cgroup_lru_names_not_uptodate(void)
|
||||
BUILD_BUG_ON(ARRAY_SIZE(mem_cgroup_lru_names) != NR_LRU_LISTS);
|
||||
}
|
||||
|
||||
static int memcg_stat_show(struct cgroup_subsys_state *css, struct cftype *cft,
|
||||
struct seq_file *m)
|
||||
static int memcg_stat_show(struct seq_file *m, void *v)
|
||||
{
|
||||
struct mem_cgroup *memcg = mem_cgroup_from_css(css);
|
||||
struct mem_cgroup *memcg = mem_cgroup_from_css(seq_css(m));
|
||||
struct mem_cgroup *mi;
|
||||
unsigned int i;
|
||||
|
||||
@ -5651,13 +5686,11 @@ static void mem_cgroup_oom_notify(struct mem_cgroup *memcg)
|
||||
mem_cgroup_oom_notify_cb(iter);
|
||||
}
|
||||
|
||||
static int mem_cgroup_usage_register_event(struct cgroup_subsys_state *css,
|
||||
struct cftype *cft, struct eventfd_ctx *eventfd, const char *args)
|
||||
static int __mem_cgroup_usage_register_event(struct mem_cgroup *memcg,
|
||||
struct eventfd_ctx *eventfd, const char *args, enum res_type type)
|
||||
{
|
||||
struct mem_cgroup *memcg = mem_cgroup_from_css(css);
|
||||
struct mem_cgroup_thresholds *thresholds;
|
||||
struct mem_cgroup_threshold_ary *new;
|
||||
enum res_type type = MEMFILE_TYPE(cft->private);
|
||||
u64 threshold, usage;
|
||||
int i, size, ret;
|
||||
|
||||
@ -5734,13 +5767,23 @@ unlock:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void mem_cgroup_usage_unregister_event(struct cgroup_subsys_state *css,
|
||||
struct cftype *cft, struct eventfd_ctx *eventfd)
|
||||
static int mem_cgroup_usage_register_event(struct mem_cgroup *memcg,
|
||||
struct eventfd_ctx *eventfd, const char *args)
|
||||
{
|
||||
return __mem_cgroup_usage_register_event(memcg, eventfd, args, _MEM);
|
||||
}
|
||||
|
||||
static int memsw_cgroup_usage_register_event(struct mem_cgroup *memcg,
|
||||
struct eventfd_ctx *eventfd, const char *args)
|
||||
{
|
||||
return __mem_cgroup_usage_register_event(memcg, eventfd, args, _MEMSWAP);
|
||||
}
|
||||
|
||||
static void __mem_cgroup_usage_unregister_event(struct mem_cgroup *memcg,
|
||||
struct eventfd_ctx *eventfd, enum res_type type)
|
||||
{
|
||||
struct mem_cgroup *memcg = mem_cgroup_from_css(css);
|
||||
struct mem_cgroup_thresholds *thresholds;
|
||||
struct mem_cgroup_threshold_ary *new;
|
||||
enum res_type type = MEMFILE_TYPE(cft->private);
|
||||
u64 usage;
|
||||
int i, j, size;
|
||||
|
||||
@ -5813,14 +5856,23 @@ unlock:
|
||||
mutex_unlock(&memcg->thresholds_lock);
|
||||
}
|
||||
|
||||
static int mem_cgroup_oom_register_event(struct cgroup_subsys_state *css,
|
||||
struct cftype *cft, struct eventfd_ctx *eventfd, const char *args)
|
||||
static void mem_cgroup_usage_unregister_event(struct mem_cgroup *memcg,
|
||||
struct eventfd_ctx *eventfd)
|
||||
{
|
||||
struct mem_cgroup *memcg = mem_cgroup_from_css(css);
|
||||
struct mem_cgroup_eventfd_list *event;
|
||||
enum res_type type = MEMFILE_TYPE(cft->private);
|
||||
return __mem_cgroup_usage_unregister_event(memcg, eventfd, _MEM);
|
||||
}
|
||||
|
||||
static void memsw_cgroup_usage_unregister_event(struct mem_cgroup *memcg,
|
||||
struct eventfd_ctx *eventfd)
|
||||
{
|
||||
return __mem_cgroup_usage_unregister_event(memcg, eventfd, _MEMSWAP);
|
||||
}
|
||||
|
||||
static int mem_cgroup_oom_register_event(struct mem_cgroup *memcg,
|
||||
struct eventfd_ctx *eventfd, const char *args)
|
||||
{
|
||||
struct mem_cgroup_eventfd_list *event;
|
||||
|
||||
BUG_ON(type != _OOM_TYPE);
|
||||
event = kmalloc(sizeof(*event), GFP_KERNEL);
|
||||
if (!event)
|
||||
return -ENOMEM;
|
||||
@ -5838,14 +5890,10 @@ static int mem_cgroup_oom_register_event(struct cgroup_subsys_state *css,
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void mem_cgroup_oom_unregister_event(struct cgroup_subsys_state *css,
|
||||
struct cftype *cft, struct eventfd_ctx *eventfd)
|
||||
static void mem_cgroup_oom_unregister_event(struct mem_cgroup *memcg,
|
||||
struct eventfd_ctx *eventfd)
|
||||
{
|
||||
struct mem_cgroup *memcg = mem_cgroup_from_css(css);
|
||||
struct mem_cgroup_eventfd_list *ev, *tmp;
|
||||
enum res_type type = MEMFILE_TYPE(cft->private);
|
||||
|
||||
BUG_ON(type != _OOM_TYPE);
|
||||
|
||||
spin_lock(&memcg_oom_lock);
|
||||
|
||||
@ -5859,17 +5907,12 @@ static void mem_cgroup_oom_unregister_event(struct cgroup_subsys_state *css,
|
||||
spin_unlock(&memcg_oom_lock);
|
||||
}
|
||||
|
||||
static int mem_cgroup_oom_control_read(struct cgroup_subsys_state *css,
|
||||
struct cftype *cft, struct cgroup_map_cb *cb)
|
||||
static int mem_cgroup_oom_control_read(struct seq_file *sf, void *v)
|
||||
{
|
||||
struct mem_cgroup *memcg = mem_cgroup_from_css(css);
|
||||
struct mem_cgroup *memcg = mem_cgroup_from_css(seq_css(sf));
|
||||
|
||||
cb->fill(cb, "oom_kill_disable", memcg->oom_kill_disable);
|
||||
|
||||
if (atomic_read(&memcg->under_oom))
|
||||
cb->fill(cb, "under_oom", 1);
|
||||
else
|
||||
cb->fill(cb, "under_oom", 0);
|
||||
seq_printf(sf, "oom_kill_disable %d\n", memcg->oom_kill_disable);
|
||||
seq_printf(sf, "under_oom %d\n", (bool)atomic_read(&memcg->under_oom));
|
||||
return 0;
|
||||
}
|
||||
|
||||
@ -5962,41 +6005,261 @@ static void kmem_cgroup_css_offline(struct mem_cgroup *memcg)
|
||||
}
|
||||
#endif
|
||||
|
||||
/*
|
||||
* DO NOT USE IN NEW FILES.
|
||||
*
|
||||
* "cgroup.event_control" implementation.
|
||||
*
|
||||
* This is way over-engineered. It tries to support fully configurable
|
||||
* events for each user. Such level of flexibility is completely
|
||||
* unnecessary especially in the light of the planned unified hierarchy.
|
||||
*
|
||||
* Please deprecate this and replace with something simpler if at all
|
||||
* possible.
|
||||
*/
|
||||
|
||||
/*
|
||||
* Unregister event and free resources.
|
||||
*
|
||||
* Gets called from workqueue.
|
||||
*/
|
||||
static void memcg_event_remove(struct work_struct *work)
|
||||
{
|
||||
struct mem_cgroup_event *event =
|
||||
container_of(work, struct mem_cgroup_event, remove);
|
||||
struct mem_cgroup *memcg = event->memcg;
|
||||
|
||||
remove_wait_queue(event->wqh, &event->wait);
|
||||
|
||||
event->unregister_event(memcg, event->eventfd);
|
||||
|
||||
/* Notify userspace the event is going away. */
|
||||
eventfd_signal(event->eventfd, 1);
|
||||
|
||||
eventfd_ctx_put(event->eventfd);
|
||||
kfree(event);
|
||||
css_put(&memcg->css);
|
||||
}
|
||||
|
||||
/*
|
||||
* Gets called on POLLHUP on eventfd when user closes it.
|
||||
*
|
||||
* Called with wqh->lock held and interrupts disabled.
|
||||
*/
|
||||
static int memcg_event_wake(wait_queue_t *wait, unsigned mode,
|
||||
int sync, void *key)
|
||||
{
|
||||
struct mem_cgroup_event *event =
|
||||
container_of(wait, struct mem_cgroup_event, wait);
|
||||
struct mem_cgroup *memcg = event->memcg;
|
||||
unsigned long flags = (unsigned long)key;
|
||||
|
||||
if (flags & POLLHUP) {
|
||||
/*
|
||||
* If the event has been detached at cgroup removal, we
|
||||
* can simply return knowing the other side will cleanup
|
||||
* for us.
|
||||
*
|
||||
* We can't race against event freeing since the other
|
||||
* side will require wqh->lock via remove_wait_queue(),
|
||||
* which we hold.
|
||||
*/
|
||||
spin_lock(&memcg->event_list_lock);
|
||||
if (!list_empty(&event->list)) {
|
||||
list_del_init(&event->list);
|
||||
/*
|
||||
* We are in atomic context, but cgroup_event_remove()
|
||||
* may sleep, so we have to call it in workqueue.
|
||||
*/
|
||||
schedule_work(&event->remove);
|
||||
}
|
||||
spin_unlock(&memcg->event_list_lock);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void memcg_event_ptable_queue_proc(struct file *file,
|
||||
wait_queue_head_t *wqh, poll_table *pt)
|
||||
{
|
||||
struct mem_cgroup_event *event =
|
||||
container_of(pt, struct mem_cgroup_event, pt);
|
||||
|
||||
event->wqh = wqh;
|
||||
add_wait_queue(wqh, &event->wait);
|
||||
}
|
||||
|
||||
/*
|
||||
* DO NOT USE IN NEW FILES.
|
||||
*
|
||||
* Parse input and register new cgroup event handler.
|
||||
*
|
||||
* Input must be in format '<event_fd> <control_fd> <args>'.
|
||||
* Interpretation of args is defined by control file implementation.
|
||||
*/
|
||||
static int memcg_write_event_control(struct cgroup_subsys_state *css,
|
||||
struct cftype *cft, const char *buffer)
|
||||
{
|
||||
struct mem_cgroup *memcg = mem_cgroup_from_css(css);
|
||||
struct mem_cgroup_event *event;
|
||||
struct cgroup_subsys_state *cfile_css;
|
||||
unsigned int efd, cfd;
|
||||
struct fd efile;
|
||||
struct fd cfile;
|
||||
const char *name;
|
||||
char *endp;
|
||||
int ret;
|
||||
|
||||
efd = simple_strtoul(buffer, &endp, 10);
|
||||
if (*endp != ' ')
|
||||
return -EINVAL;
|
||||
buffer = endp + 1;
|
||||
|
||||
cfd = simple_strtoul(buffer, &endp, 10);
|
||||
if ((*endp != ' ') && (*endp != '\0'))
|
||||
return -EINVAL;
|
||||
buffer = endp + 1;
|
||||
|
||||
event = kzalloc(sizeof(*event), GFP_KERNEL);
|
||||
if (!event)
|
||||
return -ENOMEM;
|
||||
|
||||
event->memcg = memcg;
|
||||
INIT_LIST_HEAD(&event->list);
|
||||
init_poll_funcptr(&event->pt, memcg_event_ptable_queue_proc);
|
||||
init_waitqueue_func_entry(&event->wait, memcg_event_wake);
|
||||
INIT_WORK(&event->remove, memcg_event_remove);
|
||||
|
||||
efile = fdget(efd);
|
||||
if (!efile.file) {
|
||||
ret = -EBADF;
|
||||
goto out_kfree;
|
||||
}
|
||||
|
||||
event->eventfd = eventfd_ctx_fileget(efile.file);
|
||||
if (IS_ERR(event->eventfd)) {
|
||||
ret = PTR_ERR(event->eventfd);
|
||||
goto out_put_efile;
|
||||
}
|
||||
|
||||
cfile = fdget(cfd);
|
||||
if (!cfile.file) {
|
||||
ret = -EBADF;
|
||||
goto out_put_eventfd;
|
||||
}
|
||||
|
||||
/* the process need read permission on control file */
|
||||
/* AV: shouldn't we check that it's been opened for read instead? */
|
||||
ret = inode_permission(file_inode(cfile.file), MAY_READ);
|
||||
if (ret < 0)
|
||||
goto out_put_cfile;
|
||||
|
||||
/*
|
||||
* Determine the event callbacks and set them in @event. This used
|
||||
* to be done via struct cftype but cgroup core no longer knows
|
||||
* about these events. The following is crude but the whole thing
|
||||
* is for compatibility anyway.
|
||||
*
|
||||
* DO NOT ADD NEW FILES.
|
||||
*/
|
||||
name = cfile.file->f_dentry->d_name.name;
|
||||
|
||||
if (!strcmp(name, "memory.usage_in_bytes")) {
|
||||
event->register_event = mem_cgroup_usage_register_event;
|
||||
event->unregister_event = mem_cgroup_usage_unregister_event;
|
||||
} else if (!strcmp(name, "memory.oom_control")) {
|
||||
event->register_event = mem_cgroup_oom_register_event;
|
||||
event->unregister_event = mem_cgroup_oom_unregister_event;
|
||||
} else if (!strcmp(name, "memory.pressure_level")) {
|
||||
event->register_event = vmpressure_register_event;
|
||||
event->unregister_event = vmpressure_unregister_event;
|
||||
} else if (!strcmp(name, "memory.memsw.usage_in_bytes")) {
|
||||
event->register_event = memsw_cgroup_usage_register_event;
|
||||
event->unregister_event = memsw_cgroup_usage_unregister_event;
|
||||
} else {
|
||||
ret = -EINVAL;
|
||||
goto out_put_cfile;
|
||||
}
|
||||
|
||||
/*
|
||||
* Verify @cfile should belong to @css. Also, remaining events are
|
||||
* automatically removed on cgroup destruction but the removal is
|
||||
* asynchronous, so take an extra ref on @css.
|
||||
*/
|
||||
rcu_read_lock();
|
||||
|
||||
ret = -EINVAL;
|
||||
cfile_css = css_from_dir(cfile.file->f_dentry->d_parent,
|
||||
&mem_cgroup_subsys);
|
||||
if (cfile_css == css && css_tryget(css))
|
||||
ret = 0;
|
||||
|
||||
rcu_read_unlock();
|
||||
if (ret)
|
||||
goto out_put_cfile;
|
||||
|
||||
ret = event->register_event(memcg, event->eventfd, buffer);
|
||||
if (ret)
|
||||
goto out_put_css;
|
||||
|
||||
efile.file->f_op->poll(efile.file, &event->pt);
|
||||
|
||||
spin_lock(&memcg->event_list_lock);
|
||||
list_add(&event->list, &memcg->event_list);
|
||||
spin_unlock(&memcg->event_list_lock);
|
||||
|
||||
fdput(cfile);
|
||||
fdput(efile);
|
||||
|
||||
return 0;
|
||||
|
||||
out_put_css:
|
||||
css_put(css);
|
||||
out_put_cfile:
|
||||
fdput(cfile);
|
||||
out_put_eventfd:
|
||||
eventfd_ctx_put(event->eventfd);
|
||||
out_put_efile:
|
||||
fdput(efile);
|
||||
out_kfree:
|
||||
kfree(event);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static struct cftype mem_cgroup_files[] = {
|
||||
{
|
||||
.name = "usage_in_bytes",
|
||||
.private = MEMFILE_PRIVATE(_MEM, RES_USAGE),
|
||||
.read = mem_cgroup_read,
|
||||
.register_event = mem_cgroup_usage_register_event,
|
||||
.unregister_event = mem_cgroup_usage_unregister_event,
|
||||
.read_u64 = mem_cgroup_read_u64,
|
||||
},
|
||||
{
|
||||
.name = "max_usage_in_bytes",
|
||||
.private = MEMFILE_PRIVATE(_MEM, RES_MAX_USAGE),
|
||||
.trigger = mem_cgroup_reset,
|
||||
.read = mem_cgroup_read,
|
||||
.read_u64 = mem_cgroup_read_u64,
|
||||
},
|
||||
{
|
||||
.name = "limit_in_bytes",
|
||||
.private = MEMFILE_PRIVATE(_MEM, RES_LIMIT),
|
||||
.write_string = mem_cgroup_write,
|
||||
.read = mem_cgroup_read,
|
||||
.read_u64 = mem_cgroup_read_u64,
|
||||
},
|
||||
{
|
||||
.name = "soft_limit_in_bytes",
|
||||
.private = MEMFILE_PRIVATE(_MEM, RES_SOFT_LIMIT),
|
||||
.write_string = mem_cgroup_write,
|
||||
.read = mem_cgroup_read,
|
||||
.read_u64 = mem_cgroup_read_u64,
|
||||
},
|
||||
{
|
||||
.name = "failcnt",
|
||||
.private = MEMFILE_PRIVATE(_MEM, RES_FAILCNT),
|
||||
.trigger = mem_cgroup_reset,
|
||||
.read = mem_cgroup_read,
|
||||
.read_u64 = mem_cgroup_read_u64,
|
||||
},
|
||||
{
|
||||
.name = "stat",
|
||||
.read_seq_string = memcg_stat_show,
|
||||
.seq_show = memcg_stat_show,
|
||||
},
|
||||
{
|
||||
.name = "force_empty",
|
||||
@ -6008,6 +6271,12 @@ static struct cftype mem_cgroup_files[] = {
|
||||
.write_u64 = mem_cgroup_hierarchy_write,
|
||||
.read_u64 = mem_cgroup_hierarchy_read,
|
||||
},
|
||||
{
|
||||
.name = "cgroup.event_control", /* XXX: for compat */
|
||||
.write_string = memcg_write_event_control,
|
||||
.flags = CFTYPE_NO_PREFIX,
|
||||
.mode = S_IWUGO,
|
||||
},
|
||||
{
|
||||
.name = "swappiness",
|
||||
.read_u64 = mem_cgroup_swappiness_read,
|
||||
@ -6020,21 +6289,17 @@ static struct cftype mem_cgroup_files[] = {
|
||||
},
|
||||
{
|
||||
.name = "oom_control",
|
||||
.read_map = mem_cgroup_oom_control_read,
|
||||
.seq_show = mem_cgroup_oom_control_read,
|
||||
.write_u64 = mem_cgroup_oom_control_write,
|
||||
.register_event = mem_cgroup_oom_register_event,
|
||||
.unregister_event = mem_cgroup_oom_unregister_event,
|
||||
.private = MEMFILE_PRIVATE(_OOM_TYPE, OOM_CONTROL),
|
||||
},
|
||||
{
|
||||
.name = "pressure_level",
|
||||
.register_event = vmpressure_register_event,
|
||||
.unregister_event = vmpressure_unregister_event,
|
||||
},
|
||||
#ifdef CONFIG_NUMA
|
||||
{
|
||||
.name = "numa_stat",
|
||||
.read_seq_string = memcg_numa_stat_show,
|
||||
.seq_show = memcg_numa_stat_show,
|
||||
},
|
||||
#endif
|
||||
#ifdef CONFIG_MEMCG_KMEM
|
||||
@ -6042,29 +6307,29 @@ static struct cftype mem_cgroup_files[] = {
|
||||
.name = "kmem.limit_in_bytes",
|
||||
.private = MEMFILE_PRIVATE(_KMEM, RES_LIMIT),
|
||||
.write_string = mem_cgroup_write,
|
||||
.read = mem_cgroup_read,
|
||||
.read_u64 = mem_cgroup_read_u64,
|
||||
},
|
||||
{
|
||||
.name = "kmem.usage_in_bytes",
|
||||
.private = MEMFILE_PRIVATE(_KMEM, RES_USAGE),
|
||||
.read = mem_cgroup_read,
|
||||
.read_u64 = mem_cgroup_read_u64,
|
||||
},
|
||||
{
|
||||
.name = "kmem.failcnt",
|
||||
.private = MEMFILE_PRIVATE(_KMEM, RES_FAILCNT),
|
||||
.trigger = mem_cgroup_reset,
|
||||
.read = mem_cgroup_read,
|
||||
.read_u64 = mem_cgroup_read_u64,
|
||||
},
|
||||
{
|
||||
.name = "kmem.max_usage_in_bytes",
|
||||
.private = MEMFILE_PRIVATE(_KMEM, RES_MAX_USAGE),
|
||||
.trigger = mem_cgroup_reset,
|
||||
.read = mem_cgroup_read,
|
||||
.read_u64 = mem_cgroup_read_u64,
|
||||
},
|
||||
#ifdef CONFIG_SLABINFO
|
||||
{
|
||||
.name = "kmem.slabinfo",
|
||||
.read_seq_string = mem_cgroup_slabinfo_read,
|
||||
.seq_show = mem_cgroup_slabinfo_read,
|
||||
},
|
||||
#endif
|
||||
#endif
|
||||
@ -6076,27 +6341,25 @@ static struct cftype memsw_cgroup_files[] = {
|
||||
{
|
||||
.name = "memsw.usage_in_bytes",
|
||||
.private = MEMFILE_PRIVATE(_MEMSWAP, RES_USAGE),
|
||||
.read = mem_cgroup_read,
|
||||
.register_event = mem_cgroup_usage_register_event,
|
||||
.unregister_event = mem_cgroup_usage_unregister_event,
|
||||
.read_u64 = mem_cgroup_read_u64,
|
||||
},
|
||||
{
|
||||
.name = "memsw.max_usage_in_bytes",
|
||||
.private = MEMFILE_PRIVATE(_MEMSWAP, RES_MAX_USAGE),
|
||||
.trigger = mem_cgroup_reset,
|
||||
.read = mem_cgroup_read,
|
||||
.read_u64 = mem_cgroup_read_u64,
|
||||
},
|
||||
{
|
||||
.name = "memsw.limit_in_bytes",
|
||||
.private = MEMFILE_PRIVATE(_MEMSWAP, RES_LIMIT),
|
||||
.write_string = mem_cgroup_write,
|
||||
.read = mem_cgroup_read,
|
||||
.read_u64 = mem_cgroup_read_u64,
|
||||
},
|
||||
{
|
||||
.name = "memsw.failcnt",
|
||||
.private = MEMFILE_PRIVATE(_MEMSWAP, RES_FAILCNT),
|
||||
.trigger = mem_cgroup_reset,
|
||||
.read = mem_cgroup_read,
|
||||
.read_u64 = mem_cgroup_read_u64,
|
||||
},
|
||||
{ }, /* terminate */
|
||||
};
|
||||
@ -6268,6 +6531,8 @@ mem_cgroup_css_alloc(struct cgroup_subsys_state *parent_css)
|
||||
mutex_init(&memcg->thresholds_lock);
|
||||
spin_lock_init(&memcg->move_lock);
|
||||
vmpressure_init(&memcg->vmpressure);
|
||||
INIT_LIST_HEAD(&memcg->event_list);
|
||||
spin_lock_init(&memcg->event_list_lock);
|
||||
|
||||
return &memcg->css;
|
||||
|
||||
@ -6343,6 +6608,19 @@ static void mem_cgroup_invalidate_reclaim_iterators(struct mem_cgroup *memcg)
|
||||
static void mem_cgroup_css_offline(struct cgroup_subsys_state *css)
|
||||
{
|
||||
struct mem_cgroup *memcg = mem_cgroup_from_css(css);
|
||||
struct mem_cgroup_event *event, *tmp;
|
||||
|
||||
/*
|
||||
* Unregister events and notify userspace.
|
||||
* Notify userspace about cgroup removing only after rmdir of cgroup
|
||||
* directory to avoid race between userspace and kernelspace.
|
||||
*/
|
||||
spin_lock(&memcg->event_list_lock);
|
||||
list_for_each_entry_safe(event, tmp, &memcg->event_list, list) {
|
||||
list_del_init(&event->list);
|
||||
schedule_work(&event->remove);
|
||||
}
|
||||
spin_unlock(&memcg->event_list_lock);
|
||||
|
||||
kmem_cgroup_css_offline(memcg);
|
||||
|
||||
|
||||
@ -451,7 +451,7 @@ unsigned short swap_cgroup_record(swp_entry_t ent, unsigned short id)
|
||||
* lookup_swap_cgroup_id - lookup mem_cgroup id tied to swap entry
|
||||
* @ent: swap entry to be looked up.
|
||||
*
|
||||
* Returns CSS ID of mem_cgroup at success. 0 at failure. (0 is invalid ID)
|
||||
* Returns ID of mem_cgroup at success. 0 at failure. (0 is invalid ID)
|
||||
*/
|
||||
unsigned short lookup_swap_cgroup_id(swp_entry_t ent)
|
||||
{
|
||||
|
||||
@ -278,8 +278,7 @@ void vmpressure_prio(gfp_t gfp, struct mem_cgroup *memcg, int prio)
|
||||
|
||||
/**
|
||||
* vmpressure_register_event() - Bind vmpressure notifications to an eventfd
|
||||
* @css: css that is interested in vmpressure notifications
|
||||
* @cft: cgroup control files handle
|
||||
* @memcg: memcg that is interested in vmpressure notifications
|
||||
* @eventfd: eventfd context to link notifications with
|
||||
* @args: event arguments (used to set up a pressure level threshold)
|
||||
*
|
||||
@ -289,15 +288,12 @@ void vmpressure_prio(gfp_t gfp, struct mem_cgroup *memcg, int prio)
|
||||
* threshold (one of vmpressure_str_levels, i.e. "low", "medium", or
|
||||
* "critical").
|
||||
*
|
||||
* This function should not be used directly, just pass it to (struct
|
||||
* cftype).register_event, and then cgroup core will handle everything by
|
||||
* itself.
|
||||
* To be used as memcg event method.
|
||||
*/
|
||||
int vmpressure_register_event(struct cgroup_subsys_state *css,
|
||||
struct cftype *cft, struct eventfd_ctx *eventfd,
|
||||
const char *args)
|
||||
int vmpressure_register_event(struct mem_cgroup *memcg,
|
||||
struct eventfd_ctx *eventfd, const char *args)
|
||||
{
|
||||
struct vmpressure *vmpr = css_to_vmpressure(css);
|
||||
struct vmpressure *vmpr = memcg_to_vmpressure(memcg);
|
||||
struct vmpressure_event *ev;
|
||||
int level;
|
||||
|
||||
@ -325,23 +321,19 @@ int vmpressure_register_event(struct cgroup_subsys_state *css,
|
||||
|
||||
/**
|
||||
* vmpressure_unregister_event() - Unbind eventfd from vmpressure
|
||||
* @css: css handle
|
||||
* @cft: cgroup control files handle
|
||||
* @memcg: memcg handle
|
||||
* @eventfd: eventfd context that was used to link vmpressure with the @cg
|
||||
*
|
||||
* This function does internal manipulations to detach the @eventfd from
|
||||
* the vmpressure notifications, and then frees internal resources
|
||||
* associated with the @eventfd (but the @eventfd itself is not freed).
|
||||
*
|
||||
* This function should not be used directly, just pass it to (struct
|
||||
* cftype).unregister_event, and then cgroup core will handle everything
|
||||
* by itself.
|
||||
* To be used as memcg event method.
|
||||
*/
|
||||
void vmpressure_unregister_event(struct cgroup_subsys_state *css,
|
||||
struct cftype *cft,
|
||||
void vmpressure_unregister_event(struct mem_cgroup *memcg,
|
||||
struct eventfd_ctx *eventfd)
|
||||
{
|
||||
struct vmpressure *vmpr = css_to_vmpressure(css);
|
||||
struct vmpressure *vmpr = memcg_to_vmpressure(memcg);
|
||||
struct vmpressure_event *ev;
|
||||
|
||||
mutex_lock(&vmpr->events_lock);
|
||||
|
||||
@ -173,14 +173,14 @@ static u64 read_prioidx(struct cgroup_subsys_state *css, struct cftype *cft)
|
||||
return css->cgroup->id;
|
||||
}
|
||||
|
||||
static int read_priomap(struct cgroup_subsys_state *css, struct cftype *cft,
|
||||
struct cgroup_map_cb *cb)
|
||||
static int read_priomap(struct seq_file *sf, void *v)
|
||||
{
|
||||
struct net_device *dev;
|
||||
|
||||
rcu_read_lock();
|
||||
for_each_netdev_rcu(&init_net, dev)
|
||||
cb->fill(cb, dev->name, netprio_prio(css, dev));
|
||||
seq_printf(sf, "%s %u\n", dev->name,
|
||||
netprio_prio(seq_css(sf), dev));
|
||||
rcu_read_unlock();
|
||||
return 0;
|
||||
}
|
||||
@ -238,7 +238,7 @@ static struct cftype ss_files[] = {
|
||||
},
|
||||
{
|
||||
.name = "ifpriomap",
|
||||
.read_map = read_priomap,
|
||||
.seq_show = read_priomap,
|
||||
.write_string = write_priomap,
|
||||
},
|
||||
{ } /* terminate */
|
||||
|
||||
@ -274,10 +274,9 @@ static void set_majmin(char *str, unsigned m)
|
||||
sprintf(str, "%u", m);
|
||||
}
|
||||
|
||||
static int devcgroup_seq_read(struct cgroup_subsys_state *css,
|
||||
struct cftype *cft, struct seq_file *m)
|
||||
static int devcgroup_seq_show(struct seq_file *m, void *v)
|
||||
{
|
||||
struct dev_cgroup *devcgroup = css_to_devcgroup(css);
|
||||
struct dev_cgroup *devcgroup = css_to_devcgroup(seq_css(m));
|
||||
struct dev_exception_item *ex;
|
||||
char maj[MAJMINLEN], min[MAJMINLEN], acc[ACCLEN];
|
||||
|
||||
@ -679,7 +678,7 @@ static struct cftype dev_cgroup_files[] = {
|
||||
},
|
||||
{
|
||||
.name = "list",
|
||||
.read_seq_string = devcgroup_seq_read,
|
||||
.seq_show = devcgroup_seq_show,
|
||||
.private = DEVCG_LIST,
|
||||
},
|
||||
{ } /* terminate */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user